SMTP relay without the hassle
for existing systems

Why the Maillog SMTP relay

The same deliverability infrastructure as our REST API, reachable over the protocol your systems already speak.

Connect in 3 steps

1. 1

   Verify your domain

   Add your domain in the dashboard and set the DNS records for verification and delivery (SPF/DKIM).

2. 2

   Grab your credentials

   Every verified domain gets its own SMTP username. The password is your Maillog API key.

3. 3

   Swap the host

   Replace the host in your existing configuration with smtp.maillog.nl on port 587. Your code stays untouched.

Simple, predictable pricing

Frequently asked questions

What is an SMTP relay?

An SMTP relay is an outgoing mail server that accepts email from your application, website, or hardware and delivers it reliably to the recipient. You don't run a mail server yourself: point your system at smtp.maillog.nl and Maillog handles delivery, reputation, and monitoring.

Which SMTP settings do I use?

Host: smtp.maillog.nl, port 587. Each verified domain gets its own SMTP username; the password is your Maillog API key (ma_...). You can find these credentials in the dashboard under SMTP once your domain is verified.

Do I need to use TLS?

STARTTLS is supported on port 587 and is optional; SSL is not required. We recommend STARTTLS whenever your system supports it, so the connection between your system and our server is encrypted.

How do I migrate from my current provider?

In three steps: verify your domain in Maillog, grab that domain's SMTP username, and replace the host, username, and password in your existing configuration. Your code stays the same — only the settings change.

What is the difference between the SMTP relay and the email API?

Both send through the same infrastructure. The REST API is convenient for new code and returns JSON directly; the SMTP relay is meant for systems that already speak SMTP — existing applications, scanners, printers, and CMS plugins — without changing any code.

Is there a free tier?

Yes. The free tier includes 100 emails per day, one domain, and 7-day log retention. No credit card is required to sign up, and the SMTP relay is included by default.